Question

maternal blood means

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Answer 1

Answer:

Maternal blood bathes the chorionic villi, which consist of a layer of trophoblastic cells that enclose fetal capillaries. Their large surface area and the high placental blood flow (500 mL/min) are essential for gas exchange, uptake of nutrients and elimination of waste products.

it is found when baby is inside the womb

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Answer 2

Answer:

Maternal blood screening.

Maternal blood screening is normally done in early in pregnancy to test for a variety of conditions. Abnormal amount of certain proteins in a pregnant women's blood raise the probability of fetal defects